Efficiently Constructing the Visibility Graph of a Simple Polygon with Obstacles

  • Authors:
  • Sanjiv Kapoor;S. N. Maheshwari

  • Affiliations:
  • -;-

  • Venue:
  • SIAM Journal on Computing
  • Year:
  • 2000

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Abstract

This paper describes an output-sensitive scheme to construct the visibility graph of a simple polygon with m obstacles and n vertices in optimal O(|E| +T + m log n ) time where |E| is the size of the visibility graph and T is the time required to triangulate the simple polygon with obstacles. We use a partition of the space into regions called corridors which eases the efforts of the construction. Our algorithms are simple and the data structures used are only linked lists.